This issue probably occurred after setting up access control in menubuilder extensions, but it looks like a bug in the framework. Seems like there is no CAccessRule class file in yii-1.1.14, but yii lite has one. Extracting the class from yii lite and putting it into system.web.auth folder solved the problem. I am not sure if the issue is caused by unzipping process on my Windows 8 machine or something else.
